Antifriction bearing



March 13, 1928.

I H. M. PERRY ANTIFRIC'IION BEARING Filed Jan. 1924 Patented Mar. 13, 1928.

UNITED STATES PATENT OFFICE.

HUBERT M. PERRY, OF CHICAGO, ILLINOIS, ASSIGNOR TO SOPHIE IA- WOODS, OF

CHICAGO,

ILLINOIS.

ANTIFRIC'IIOLT BEARING.

Application filed January 2,1924. Serial No. 683,913.

This invention relates to improvements in antifriction bearings for railroad cars and more particularly to a side bearing carried upon the truck bolster of the car as distinguished from one carried by the body bolster of the car.

The invention consists of the matters hereinafter described and more particularly pointed out in the appended claim.

In the drawings Fig. 1 is a view in plan elevation of a side bearing embodying my invention, parts thereof being broken away to more clearly illustrate the interior construction.

Fig. 2 is a longitudinal, vertical central section through the side bearing on an enlarged scale, the plane of the section being indicated by the line 2-2 of Fig. 1.

Fig. 3 is a vie'u similar toFig. 2, with the roller shown at one limit of its movement in the casing- Fig. 4; is a transverse vertical section through the side bearing on the line H of Fi 2.

Fteferring now in detail to that embodiment of the invention illustrated in the accompanying drawings indicates the casing of the side hearing which contains the anti-friction element. Said casing consists of a rectangular shell, open top and bottom, and having upright side walls 11, 11 and upright end walls 12, 12. The casing is provided at its bottom with laterally e2 tending ears 13, 13 by means of whichit is attached to a truck bolster of a railroad car, indicated by the line 14 in Fig. 2.

15. 15 indicate upwardly inclined flanges which extend inwardly from the bottom ends, of the end walls 12 to provide parts of the bottom wall of the casing. Said flanges terminate in depending ribs 16, each of which includes a downwardly facing shoulder 16 The bottom edges of the side walls 11, 11 and the depending ribs 16 below the shoulders 16 define a rectangular opening in which is fixed a bottomfiller plate or block 17. The top surface 17 of said filler plate is flat and said plate engages at its ends against the shoulders 16*, and is locked in position by bending in the bottom ends of the ribs 16, as shown in Fig.2. Upon said fiat top surface of the filler plate rests a bearing or wear plate 18 which is curved upwardly towards its ends, so as'to be capable of a longitudinal or endwise rocking movement upon said filler plate. The inner vertical ends of the flanges 15 above the shoulders 16 provide stops 15 which prevent endwise sliding or translation of the rocking bearing plate upon the filler plate; On the end walls 11 of the casing are pro vided longitudinally spaced, downwardly facing shoulders 19' which overhang the side with the end'walls 12 of the casing in the first instance, but after the antifriction element and the plates 17, 18 have been assembled in the casing, said ribs are bent in} wardly to retain both of said plates within the casing. 1

20 indicates an antifriction element or roller which is located within the casing and is adapted to roll longitudinally on the bearing or wear plate 18 for a limited distance from the center of the casing toward each end thereof in a familiar manner. Said antifriction roller is provided at its ends with coaxial trunnions 21 which extend into but are free from engagement with the top and bottom parts of longitudinal grooves 22, 22 formed in the side walls of the easing above the ribs which include the shoulders 19 before referred to. The longitudinal grooves 22 have rounded ends 23, 23 made on a radius greater than that of the trunnions 21 of the roller. i l

'24 indicates a vertically disposed groove formed on the inner surface of each side wall, and which opens through the bottom of thecasing and into each groove 22, midway other from the end walls of the casing. The

arcuate surface 26 of. each of said shoulders is made on a radius corresponding to that Y of the periphery of the roller and said surfaces are so correlated with respect to the ends 23 of the grooves 22 that the periphcry of the roller and said trunnions will simultaneously engage with said arcuate shoulders and the ends of said grooves respectively, toarrest the rolling movement of the roller upon the wear plate. By this construction, both a trunnion stop and a body stop provided for the roller at the ends of its rolling movement; in the casing. The trnnnions will engage said ends at the horizontal middle thereof but will be free from the top and bottom parts of said ends. It is to be noted that there is no PUSSlllllll) of any bearing engagement; of the trunnions against the bottom part of said grooves. so that the roller can never rotate upon the trnnnions as axles, but the load is trans mitted at all times through the body of the roller and never in any manner through the trunnions. In that part of the end walls 12 above the flanges 15 are provided ventilation openings 2? through which cinders and the like may escape from the interior of the casing.

The operation ol the bearing is apparent:- from the description set forth. ll hen not under load, the. roller will naiurallv assume a central position in the casino. as shown in Fig. 1. When the roller is en gagged by the bearing plate on the bod bolster (not shown) and is caused to roll toward one end of the easing into that position shown in Fin. 3, the hearing or wear plate will rock endwise upon the tiller block into the position shown in Fit. 2 and the trunnions Q1 and the periphery of the rollei will simultaneously engage the ends 23 of the grooves and the curved surface Q6 of the shoulders respectively. as shown in Fig. 3. Upon release of the load in1- parted to the roller bv the bod; bolster, the rocking bearing plate will assume its nor inal position upon the tiller plate and said roller will roll toward the center ol the cusing to the position shown in full lines in Fig. .lt to be noted that when the hearing plate has rocked to the position shown in Fig. 3, its higher or left hand end is still in a position to engage the flanges 15 above the shoulders 16 so that even under a shock or jar to the car, there can he no translation of the wear plate. This construction eliminates the provision of extraneous coacting means on the bearing: and tiller plates to prevent such translation, and thu materially reduces the cost of production.

Another advantage in the construction before described is that there is no elevating of the car body when the same is taking a curve in a track.

Before the plates 17 and 18 are assembled into the casing, the roller 2t) is inserted through the opening in the bottom of the casing occupied by said plates, the trun nions ill, 21 entering the grooves 12:! through the vertical branches or parts iZ-l thereof. Alter the roller is in position the plates are locked in the casing; as before described, so that the entire side hearing may be shipped fully assembled to the place at installation upon the cars, it being impossible for the roller to be withdrawn through the top of the casing because of the engagement of the trunnions in the grooves While in describin my invention l have referred to certain details of mechanical construction and :u'rangcment of parts, I, do not wish to be limited thereto except as may be pointed out in the appended claim.

l claim as my invention:

in an anti'lriction bearing of the kind described, the con'ibination otan open top casing havingsides. ends and a bottom wall which bottom wall has an opening therein, a tiller block in said opening and bavin; a tlat top bearing surface, a longitudinally curved bearing plate engaged and capable of a longitudinal rocking movcn'ient upon said llllQI-l.)l0(ll each side wall of the easine' having a longitudinally extending groove therein, there being shoulders provided on said side walls below said grooves which overhang the side margins of the bearing plate to be engaged thereb; when said bearing plate is rocked upon the tillerblock, and a roller in said casing capable of a rolling movement on said bearing plate from the center toward either end of the casing. said roller having end trunnions which extend into but are free from engagement with the top and bottom walls of said loug'gitudinal grooves, there being parts of the casing" extending above the tiller block to be engaged by the end of the rocking plate and to arrest the endwise movement thereof upon the filler block.

In testimoirv that I claim the fore e'oiu g as my invention, I allix my signature. this 28th day of November, A. l). 19:23.

HUBERT M. PERRY.

tlll 

